Bolting-ch est and m i d d li ngs-pu ri



(H0 ModeL) 3-Sheets-Sheet 1.

J. T. LEE.

BOLTING GHEST AND MIDDLINGS PURIFIER.

N0. 821,441.. Patented July '7,

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(No Model.) V 3 Sheets-Sheet 2.

J. T. LEE.

BOLTING CHEST AND MIDDLINGS PU'RIPIER. N0. 321,441. .Pa-tented July7,1885.

WITNESSES: HWENTOR':

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J. T. LEE. 7

BOLTING CHEST AND MIDDLINGS PURIFIER.

No. 821,441 Patented July 7, 1885.

WITNESSES: INVENTOR:

JZ BY ATTORNEYS.

UNITED STATES Parent @rrrcn.

JULIUS T. LEE, OF DRYDEN, MICHIGAN.

BOLTlNG-CH EST AND MIDDLINGS-PURIFIER.

SPECIFICATION forming part of Letters Patent N0.321,441, dated July 7,1885.

Application filed July 3, 1884.

To all whom it may concern:

Be it known that I, J ULIUS T. LEE, of Dryden, in the county of Lapeerand State of Michigan, have invented a new and Improved Bolting Chestand Middlings Purifier, of which the following is a full, clear, andexact description.

The object of my invention is to accomplish with one machine the work ofbolting and purifying flour and middlings. I make use of two or foursided screens, which are given an end shake for causing the sitting ofthe mate rial, and which are turned at suitable intervals, so as tochange the screen-surface in use. I also employ cant boards for gradingthe sifted material, all as hereinafter described and claimed.

Reference is to be had to the accompanying drawings, forming part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a vertical longitudinal section of the machine. Fig. 2 is avertical transverse section. Fig. 3 is a detail view of the automaticmechanism. Fig. 4 is a detail view showing the connection between thebelt-shifting mechanism and the screens. 'Fig. 5 is a perspective Viewof a portion of the lower part of the machine and the belt-shifter,showing their construction.

The case A contains the series of screens B, arranged in a vertical tierwith intervening cant-boards, C. The screens shown are constructed offlat form, the two wider sides formed of bolting-cloth, wire-cloth, orsimilar material, and the narrower sides closed. They may, however, besquare, with cloth on each of the four sides.

The screens are supported on shafts a a. at their ends by crossbars b,and the shafts are journaled attheir outer ends in vertical side bars d,that are suspended in the case A by springs e e. The cant-boards O arerigidly connected to the end bars at for their support, and so that theyshall partake of the shaking motion. They are also inclined suitably tocarry off the middlings and flour separately, and those below the upperone have spouts f, extending sidewise to carry the flour out of thechest.

In order to shorten and lengthen the incline, so as to carry out more orless of the flour, I

(No model provide adjustable inclines g, fitted for being moved in andout by rods h, extending to the outside.

11 is a feed-spout to the interior of the top screen.

a is the bran discharge spout of the top screen.

i is a spout fromthe upper cant-board for conveying the flour to thesecond screen.

Z Z Z are spouts from the upper cant-boards, to convey the middlings tothe lower flourscreens.

. 6 is a spout for delivering ground middlings 6 5 to one of theflour-screens. The lower flourscreen and the middlings-screens belowconnect by spouts 992, so that the material passes from one to the otherwhile being graded and purified.

In connection with the lower screens, sue tion-fans 0 0 are provided fordrawing out the fluff and delivering it outside of the case.

In order to oscillate and turn the screens, a vertical shaft, 1}, isfitted at the end of the case, and has cranks or eccentrics p, connectedby rods to the end bars d, so that when the shaft is rotated all thescreens and cant-boards will be given an end shake.

On shafts a, at one end of the screens, are chain-wheels q, around whichand from one to the other passes a chain, r, that connects at its lowerend with a chain-wheel, s, on ashaft, t, of the shifting mechanism,(shown in Figs. 3, 4, and 5,) which will be placed in a convenientposition below the case. The shifting may be done by hand orautomatically by the devices shown.

t is a screw-shaft extending from the end of shaft 25 and carrying aflange or disk-nut, or, which has pins u for engaging holes or notchesin disks 1%, that are fixed on the ends of the screw-shaft.

o is a crank-arm on shaft 2?, connected by a rod, 1), with an arm, n,loose on shaft 6, the rod also passing through a hole or notch in theflange of nut to.

w is a loose pulley between two fast pulleys, w w, on the shaft t, andthere are two belts, one straight and one crossed from a drivingpulley,3/, to the fast and loose pulleys.

When in the rotation of shaft 6 the nut u reaches one end of the shaft,it looks with the disk of at that end, and consequently turns ICO withthe shaft, carrying with it rod 0 and crank-arm 12, thereby giving asemtrotation to shaft t and causing the screens to turn over. At thesame time the bar 1, provided with pins 2 on each side of the belts, ismoved by the nut a, acting on one of the levers 3, pivoted to the bar 1and to fixed supports 4, to carry one belt upon the loose pulley and theother one upon the other fast pulley, thereby reversing the motion ofthe screw-shaft and causing the nut to move to the other end.

The mechanism is to be timed to give the screens a turn at intervals of,say, from ten to thirty minutes. The effect is to bring the upper sereensurface down to the bottom into position for use, while the surfacepreviously in use goes to the top, and any bran or material that may bein the meshes will be caused to drop out by the shake of the screen,aided by suitable knockers, if required.

The screens are thus self-cleaning, and they also act more effectivelythan common reels, as they allow the flour to drop straight downward.

I have shown at b in Fig. 2 cross-partitions to prevent the materialfrom dusting down upon the screens from above at the ends of thecantboards. A partition running vertically from the top to the bottomsieve may be used for the same purpose, and perforated to allow of theair-currents.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a bolting-chest, the combination, with a casing, of a series ofhollow screens provided with opposite screen-faces and arranged oneabove the other, and mechanism for vibrating and intermittently rotatingthe same, substantially as herein shown and described.

2. In a bolting-chest, the combination,with a casing, of a series ofhollow screens having opposite screen-faces, and means for rotating allthe screens simultaneously to bring either face into use, substantiallyas herein shown and described.

3. In a bolting-chest, the combination,with a casing, of vertical bars,the hollow screens, their shafts journaled in said bars, and means foroscillating said bar, substantially as herein shown and described.

4. In a bolting-chest, the combination, with the casing A, the verticalbars d, and springs e for supporting said bars, of the shafts a, thescreens B, the shafts 1), provided with crankarms p, connected to thebars d, and means for operating said shafts, substantially as shown anddescribed.

5. In a bolting'chest, the combination, with the casing A, thespring-supported bars d, the crank-shaft p, and means for operating thesaid shaft, of the shafts a, the screens B on said shafts, and means forintermittingly rotating the screens, substantially as herein shown anddescribed.

6. In a bolting-chest, the combination, with' the casing A, theend'bars, d, and means for vibrating the same, of the screens 13,journaled in said bars, the cant-boards O, rigidly secured to said barsbelow the screens, and means for imparting an intermittent rotarymovement to the screens, substantially as herein shown and described.

7 In a bolting-chest, the combination, with the casing A, the shafts a,provided with the ehain'wheels q, the screens B on said shafts, and thechain,r of the shaft tof the belt-shifter, provided with the chain-wheels, substantially as herein shown and described.

JULIUS T. LEE.

Witnesses:

JOHN RATTRAY, JOSEPH MANWARING.

